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TO20 Notched Straight Edge Fingerboard Ruler

The notched straight edge has become a standard for evaluating fretboards. The notches fit right over the frets so you can
check the straightness of the fretboard itself, without the interference of worn or badly-seated frets.

Made of machined stainless steel by laser cutting, satin-finished, the edges with accurate flatness,
+/- .0008”(0.02mm)

As a measuring tool, the material is very important, the stainless steel is much better than aluminum or other soft material,
the stainless steel will not be bent over time so that affect precision, and it’s more durable than the other material.